Saw-mill dog



(No Model.) 2 Sheets-Sheet 1;

A. DELANEY & J. M. BOND.

SAW MILL DOG.

Patented Dec. 1, 1885.

WITNESSES 2 It PETERS Phnto-urhc n hnr, Wazhinglon. up

2 Sheets-Sheet 2.

' (No Model.)

A. DELANEY 85 J. M. BOND.

SAW MILL DOG.

No. 331,619. Patented Dec. 1, 1885.

WITNESSES 2 av PEIERS. Phuloulkwgnphef. Walhinglem ac.

1o just-able logdog for saw-mills.

UNITED Srarns PATENT @rrrcn.

ALEXANDER DELANEY AND JOHN M. BOND, OF RIOHMON D, VIRGINIA.

SAW-MILL DOG.

SPECIFICATION forming part of Letters Patent No. 331,619, dated December 1, 1885,

Application filed May 19, 1885. Serial No. 165,998.

To aZZ whom it may concern.-

Be it known that we, ALEXANDER DELANEY and JOHN M. BOND, citizens of the United States, residing at Richmond, in the county of Henrico and State of Virginia, have invented certain new and useful Improvements in Log- Dogs for Saw-Millspf which the following is a specification.

This invention relates to an improved ad- The invention is fully illustrated in the accompanying drawings, in which Figure 1 is a side elevation of the head-block, knee, and dog, showing the position of the latter when not in use. Fig. 2 is a view of the latch as seen from atransverse direction to that shown in Fig. 1. Fig. 3 is a side elevation of the head-block, knee, and dog, showing the latter holding a log. Fig. 4 is a view of the sectorpulley, dog-lever, and guide-plate with fixed pinion. I

The letter A designates the head-block on the saw-mill carriage B, and E the knee which slides on the head-block toward or from the saw. The log-dog tooth or and the mechanism which operates it are attached at one side of the knee, and at the other side thereof we attach a board-dog, (not shown,) which latter forms the subject of a separate application of ours for a patent filed herewith. The main shaft Z1 extends the entire length of the carriage, and pinions b are on this shaft. One pinion engages with a rack, 6 attached to each knee E,wl1ereby the latter is moved. The log-dog tooth a is fixed on the end of an arm, a. A two-armed lever, O O, has a socket in each arm, and the dog-tooth arm a occupies the socket in one arm, 0, and may be extended or adjusted therein to suit any size log by means of set-screws a. A lever-handle, G is fixed in the socket of the other arm, 0, and serves for raising or drawing back the dog-tooth. The two-armed lever has a center bolt, 0, and a partly circular-shaped end provided with gear-teeth d concentric with the said center bolt. The knee, or any suitable support on the log-carriage, has a fixed guide-plate provided with an arc-shaped slot, 0, and the center bolt, 0, has movement in said slot. A pinion, e, is fixed to the knee and has on a portion of its circumference gear-teeth with which the teeth d on the lever engage. By these (No model.)

parts the dog-lever has a center which constantly shifts position when the lever moves, and the requisite throw of the lever is provided for. The lever thus arranged, in the absence of any other means, maybe thrown by the lever-handle C and then driven in the log; or a spiral or other spring may have one end fixed to the dog-lever and the other end to the knee in such manner as to have the eiiect of drawing the lever forward and down and forcing the dog-tooth into the log. Vie prefer, however, and have invented means for utilizing a weight to effect this end. A bolt, 6, passes through the fixed pinion e and into the knee, and serves as a pivot for the sectorpulley f, which has on its rim a groove for the wire rope f which is attached thereto. The sector-pulley has at one end a stop-hook, 1, which bears against the center bolt, 0, of the dog-lever, for a purpose hereinafter explained. The wire rope f hangs down from the sectorpulley and has at its lower end a block, f, which is pivoted by means of a bolt, f, to a lever, F. This lever F has one end pivoted at g on the knee, and the free end carries a weight, F, provided with a slot or otherwise adapted to slide on the lever. The weight has a set-screw, g, by means of which it may be fixed or retained on the lever at any desired position, and thereby, through the lever, block, and wire rope, exert more or less pull on the sector-pulleyf.

While we prefer the means here shown by which a weight is made to exert a pull on the dog-lever, it is obvious the dog-lever as here constructed with a shifting center, and gearteeth concentric therewith, arc-shaped slot, and fixed pinion, may be drawn forward and down by a weight otherwise connected to it. An arm, E, projects rearward from the knee and carries a latch, G, which holds the leverhandle 0 of the dog-tooth. This latch (see Fig. 2)is a bar bent at an angle. It has at one end the hook h, which engages with the lever-handle, and a pivot-hole, h, on which it swings. The other end, If, serves as a weight to cause the hook end to press in the right direction and as a handle for releasing said hook.

The operation of the log-dog is as follows: The log is first rolled on the head-block A and against the knee E. The dog-tooth arm a is adjusted in its socket to bring the dog-tooth ICO combination, a guide mounted on a suitable support and provided with an arc-shaped slot, 0, a fixed pinion, e, and a dog-lever having a center bolt, c,which has movement in the areshaped slot, and a partly-circular-shaped end provided with gear-teeth d concentric with the center bolt and engaging with the said fixed pinion, as set forth.

2. A saw-mill-dog mechanism having, in combination, a guide mounted on a suitable support and provided with an arc-shaped slot, 0, a fixed pinion, e, a dog-lever having a center bolt, 0, which has movement in the arc shaped slot, and a partly-circular-shaped end provided with gear-teeth (Z concentric with the center bolt and engaging with the said fixed pinion, and a weight connected to the doglever, substantially as described, for drawing the lever forward and down, as set forth.

3. A saw-mill-dog mechanism having, in combination, a dog-lever pivoted to move forward and down, a sector-pulleyhavingahook bearing against the dog-lever, a lever, F, pivoted by one end and the free end carrying a weight, and a rope, f, connecting the sectorpulley and weighted lever, substantially as set forth.

4- A saw-mill-dog mechanism having, in combination, a guide mounted on a suitable support and provided with an arc-shaped slot, 0, a fixed pinion, e, a dog-lever having a center bolt, 0, which has movement in the areshaped slot, and a partly-oircular-shaped end provided with gear-teeth d concentric with the center bolt and engaging with the said fixed pinion, a sector-pulley, f, having a hook which bears against the center bolt, and a weight connected to the sector-pulley, substantially as set forth.

In testimony whereof we affix our signatures in presence of two witnesses.

ALEXANDER DELANEY. JOHN M. BOND. \Vitnesses as to Alexander Delaney:

7M. E. TANNER, A. G. PHILLIPS. XVitnessesas to John M. Bond:

WV. H. WVAKEFIELD, A. G. PHILLIPS. 

